Chimney-heater



F. W. PENDERGAST.

CHIMNEY HEATER.

APPLICATION FILED 001.11, 1919.

1,343,745. Patented June 15,1920.

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r nnnnnroirw. rnnnnasasr, or GAMBRIDGE, isessacnusnrrsj GHIMNEY-HEATER.

' Specification of Letters Patent. Patented June 15, 1929,

Application filed October 11, 1919. Serial No. 329,901.

To all whom it may concern:

' Be it known that'I, Fnsnnmon W. Pure onncAs'r, a citizen of the United States, re siding at Cambridge, in the county of Mid dlesex and State of Massachusetts, have invented new and useful Improvements in Chimney-Heaters, of which the following is a specification.

This invention relates to heat-economizing means adapted to. utilize waste heat passing up a chimney. The invention has for its object to provide a simple and effective heat-economizing means or chimney heater adapted to be conveniently installed in a chimney and conduct water through a portion of the chimney flue in such manner as to cause the water to absorb a considerable portion of the waste heat, the structure being adapted to be connected with a heat radiator in an adjacent room.

The invention consists in the improvements which I will now proceed to describe and claim.

Of the accompanying drawings forming a part of this specification,

Figure 1 is a side view showing a portion of a chimney equipped with a heater embodying the invention, and a radiator connected with the heater.

' Fig. 2 is a sectional view of the chimney, V

on line 22 of Fig. 1, and an edge view of the heater.

Fig. 3 is a section on line of 2. Fig. 1 is a view siini-larto a portion of Fig. 1, the door shown by Fig. 1 being removed.

Fig. 5 is a perspective View of the heater holding means hereinafter described.

Fig. 6 is a fragmentary section on line.

66 of Fig. 7

Fig. 7 is a fragmentary section on line 7-7 of Fig. 4:.

Fig. 8 is a fragmentary sectional view on line 8'8 of Fig. 2.

Fig. 9 is a fragmentary sectional view on line 9-9 of Fig. 2.

Fig. 10 is a fragmentary sectional View on line 1010 of Fig. 2.

The same reference characters indicate the same parts in all of the figures.

In the drawings, 12 represents chimney, in one side of which is formed an opening 13, said openin being vertically elongated, and its width ein substantially equal to the width of the chimney flue.

My improved heater is embodied'in" a structure adapted to be inserted in the opening 13,'and'suitably secured therein. rd structure includes a plurality of n" ow elongated water conduits 14, having parallel substantially vertical sides, a; lower transverse header 15, communicating through openings 16 with the lower ends of the water conduits ll, and a transverse upper header 1T communicating through openings 18 with the upper ends of the water eonduits.

' As best shown by Figs. (3 andT, the water conduits 14 are provided with flanges 19, which bear on the external surfaces the headers, and are brazed or otherwise at tached thereto to form water-fight joints around the openings 16 and 18.

The headers 15 and '17 may be connected with a radiator 22 by pipes 20 and 21, communicating with the radiator and with tne lower header 25, and a vertical pipe 23 connecting the two headers. it do not limit in Y self to this arrangement" of connections, 1. y object being to so connect the water conduits 14 with the radiator 22, that relatively hot water will flow from the water conduits to the radiator, and cooler water will fl w from the radiator to the water conduits.

It will be seen by reference to Fig. 6, that water is adapted o flow from one of the headers into the water conduits 14C. and from I prefer to connectthe inner er of conduits by a plate 1 1, which bears on the inner side of the chimney flue, and may be supportedby a fixed ledge 10, (Fig. 2).

The water conduits 14.- are separated from each other at their forward edges, so that a flue-cleaning brush may be readily inserted between the conduits and moved vertically, to remove soot from their external surfaces.

To provide for the convenient installation of the heater in the chimney 13, I provide supporting means attachable to the chimney, and provided with a movable closure for the opening 13, said supporting means being suitably attached to portions of the heater structure.

As here shown, I have embodied. the sup porting means in a frame 27, formed to surround the opening 13, and provided with a flange 28, formed to bear on the outer face of the chimney. The top and bottom members of the frame may be provided with ears or brackets 29, suitably engaged with the headers and 17.

To the frame is connected by hinges 30, a door 31, formed to cover the openine surrounded by the frame. Said door, as snown by Figs. 1 and 2, is preferably provided j with an offset portion 31 at its lower end,

to accommodate the pipes and 21. The flange 28 may be secured to the chimney by bolts 33, or otherwise.

It will nowbe seen that the described heater is adapted to be conveniently installed in a chimney, without objectionably obstructing the flue. V p .i v

The only. parts of the heater that project intoothe flue are the relatively thin water conduits 14;, which are spaced apartlby per:

tions of the fine, as above stated, the headers and in the p 14; includes vertical sidewalls 149, which are parallel with each other, and form the oppo- 7 site sides of a narrow water-conducting space, narrow vertical .walls 14 connecting the side walls at the forward and rear edges of the conduit, and narrow horizontal walls 146 connecting the side walls at the upper and lower ends of the conduit.

.The side walls 149 of each conduit are preferablygsupported laterally by spacing members 85, interposed between said walls,

and riveted or otherwise attached thereto, said spacing members being arranged to permit a free circulation of water through the conduit. As shown by Figs. 9 and 10,,

the spacing member is a metal strip, extending from a point about six inches above the lower end of the conduit, to a pointabout six inches below the'upper end, water being adapted to flow across the ends of the strip.

The conduits 14 are preferably made of sheet metal, such as copper.

The heater may be. provided with a'suitable safety valve, adapted to release steam pressure, and ,to automatically close when the pressure is suitably reduced. 7

1 claim: 7

V In combination with a chimneyhaving an opening in one side above its lower or intake'portion, an attachment comprising a frame surrounding said opening, a movabl closurefor said frame forming, when closed, a portion of the chimney wall, means attaching the frame to the chimney and a heat economizing structure attached to and supported by said frame and projectingtherefrom into the chimney flue, said structure including a plurality of. substantially vertical conduits spaced from each. other to permit the passage, between adjacent conduits, of products of combustion from the flue portion of the chimney below the structure, to the flue portion above the structure, and fluid-conducting connections between said conduits, having means for connection 'with a heat radiator, the space between said conduits being exposed, to'permit the cleaning of the conduits, when said closure is displaced. f I

In testimony whereof I-have affixed my signature. V

1S FREDERICK W. 'X PENDERGAST.

mark Witnesses:

G. F. BROWN, E. BATCHELDER. 

